Fluid valve



my wm R E. www mmm@ FLUID VALVE Filed March 1.6, 1928 M FJ. E p fg 32mg EW Uww.,

@um mula Patented July 16, 1929.

PATENT.V GFFICE.

Roan-m' E. MrrToN, or SALT' LAKE crrY, oran.

FLUID VALVE.

,Application led March 16, 1928. Serial No. 262,207.

My invention relates to lluid valves, and has for its object, to provide an economical, efficient floor board valve which will be self lubricating in its action and which will eliminate many expensive parts in installation.

A further object is to provide a silently operated valve for the control of fluids, for use in automobile braking systems, and a valve which`is odorless Ibecause there are no gases allowed to escape Vinto the tonneau of the automobile.

A still further object is to provide a valve which will be controlled by the foot othe 'operator acting directly upon the control stem of the valve and in which the muscular tension. of the operator will be in direct action against the springs of the valve and the pressure of the air therein.

A still further object is to provide a valve and system of connecting said valve to the Hoor boards of the automobile so that the operator will have his foot acting directly upon the valve without connecting levers and which valve will -be so connected with the intake manifold that when the valve is released the suction of the manifold will alltomatically tend to release the brakes with suction from the manifoldthereby removing in part or in whole the necessity of comeback or release springs in thebraking system, and also providing a more instantaneous release of the brakes as operator may desire.

These objects I accomplish-'wth the device illustratedv in the accompanying drawings in which similar numerals and letters of reference indicate like lparts throughout the several views.. and as described in the specification forming a part of this applica- .tion and pointed out in the ap ended claims.

In the drawings inwhich have shown the best and most preferred manner of building my invention, Figure 1 isa diagrammatic side elevation of the device, shown installed on the floor board of an automobile. Figure2 is a section on line 2-2 of Figure 3. Figure 3 is an end view of. the valve. Figure 4 is a section of the piston and the oling portion thereof in elevation. Figure 5 is sectionof a portion of the valve showing the piston inverted from the one shown in Figure 2, to illustrate the use of this type piston in an u right valve.

vIn the use o fluids and especially air in the braking system of automobiles it .has

long been an obstacle to make a silently operated system in which the escaping air did not make a hissing noiseswhen the brakes were released. it has also been a big problem to make a valve which will be self lubricating during its action in `the control of air. The present invention eliminates all of these obstacles and'provides a valve for use on automobiles which will not only eliminate the undesirable features but gives many added features. A A

In the drawings I have shown the floor board of an automobile as A, the engine block as B, the inta-ke manifold as C, the air storage tankor supply tank as I) and the valve for controlling the iluid as E. 'The said valve 'is constructed as shown in Figure 2 of the drawings, of two cylindrical casings 1 and 2, threaded together at 3, with one end of the casing 1 enlarged to engage with the.

casing 2. Centrally through the end of said casing 1, I provide a slidable control valve 'stem 5, having an enlarged portion 6, 1nedially thereon, to forni a stop and also a spring base, the extreme end of the stem 5 is tapered and bored at' 7 to an alignment stem 8. The said ste'm 8, 'is connected with a piston 9, and a spirng 9 is carried between the piston 9 and the portion 6. The said piston 9 is made as Ashown in Figures 2 and -loi the stem 5, having a tubular piston l() on (he lower side thereof, which tubular piston is in open connection with the chamber l1, above the piston, by connection therewith of the ports 12, in the stem 8. The lower end of the tubular piston-10, is ground to form a valve seat 13, in which a ball valve 111 is adapted to seat whenclosing the valve. The said piston is formed with an oil channel 15 therearound, and with the top side 1G of the piston 9 sloping downward and spaced from the wall of the chamber 11,`to allow moving oil to flow down into the channel 15. `A packing cup leather 17 is secured to the piston 9, by the plate 18 being screwedonto a threaded portion 19 of the stem 10, and holding the cup against the lower side of the piston. 9. An oil inlet plug 20, is provided in one side -of the upper chamber 11, and an exhaust port 21, is formed through a boss 21zx on one side of the casing 1, in open connection with the said chamber 11, and is provided with suitable threads to secure lead pipes thereto. The chamber 22 below the piston 9 in the casing 2, is constricted and a ta ered hole 23 formed centrally therein with t e lower end thereof ground to form a valve seat 24 upon which seat the valve 14 is adapted to seat when the valve is closed. An application port is bored through a boss 26 formed on Vone side of the casing 2 and said port is in 'open connection with the chamber 22 through the tapered hole 23. The lower end of the casing 2 ismade in smaller diameter and is centrally bored at 27'forming a chamber 28 therein in which the valve seat 24 is the top side thereof and a plug 29 is screwedinto the threads in the bore 27 to close the end thereof. A stem 29 is formed von the inside of the plug 29 to act as a stop for the valve 14. An intake port 30 is formed in one side of the chamber 28 and is connected with the supply 'tank D by the pipe 31. A tension spring40 is carried on the stein 29? of the plug 29 and which spring bears against the ball valve 14, audvnormally holds the said' valve seated in the valve seat 24. The application port 25 is connected with the brakes of the automobile by the pipe 32 and the exhaust (port 21 is connected with the intake man-ifol of the automobile engine by the pipe 33.

The operation of the control valve stem 5 is' or may be limited in its action by the .adjustment of nut: 34 which nut is screwed into threads 35 on the outer side of the upper end of the casing 1, and a nut 36 is screwed onto the said threads to secure the valve through the running board of the car between the nut 36 and a shoulder 37 of the `easing 1.

The operation of my device is as follows: With the valve installed through the running board of the ear and with the pipe 31 connected with the supply tank, the pipe I 33 with the intake manifold of the engine and the pipe 32 connected with the application cylinders of the brakes the device ls ready for operation. dThe driver places .against the piston 9 compresses the spring 9a allowing the valve 14 to again seat in the seat 24 and .opening the seat 13 int-he stem 10 which action allows the air to pass through the stem 10 and the ports 12, and out the exhaust pipe 33 into the intake manifold of the engine. The passing of the air into .the manifold eliminates the usual noise of exhausting air, and vwhen the brakes have been released by the operator releasing the foot from the stem 5, the suction of the intake manifold passing through the pipe33,

the port 2l, the' ports 12 the stem 10 vand the port 25 will draw the air from the application lines and releaseA the -brakes automatically, and as the port 13 is normally open at all timesexcept when applying the brakes, the suctionfof the intake manlfold@ will hold the brakes released at alltimes,I which will eliminate the use 'of release springs on the brakes, or else will require only very light springs, instead of the usualv release or comeback' springs now used.

Having thus described my invention, I de' sire to secure by Letters Patent and claim:

1. A fluid valve of the class described comprising a casing; a piston operable in said-casing; intake and exhaust ports in said cas1ng; and an o1l supply channel formed on one side of said piston adapted to hold oil therein and to `supply oil to the moving parts of said piston as necessary.

2.. A Huid valve comprising a casing; a f

piston operable in said casing; a valve seat. formed in a stem on the end of said piston; a ball' valve adapted to seat in said valve seat when said piston is operated; another seat formed in the end. of said casing separating the spacewithin the casin from the intake port and in which the ba valve is normally seated by the pressure of a spring; aspring to control the movement of the piston; a stem to actuate the piston through the pressure ,of said last mentioned spring; an oil supply channel formed on the top side of said piston; and a lock nut screwed on thetop end of the said casing adapted to sev cure the valve through-the floor board of the automobileso. that the operator presses 10p 4 directly upon the control stem of the valve. y

In testimony whereof I have alxed my I signature.

ROBERT E. MITTON. 

